KR102238470B1 - Epidural catheter for drug eluting improved entry function - Google Patents

Abstract

An epidural drug delivery catheter with improved entry function includes a body extending in one direction and a distal end provided with a drug injection port extending from a first end of the body part and into which a drug is injected, and an outer surface of the distal end A plurality of threads spaced apart from each other by a predetermined distance are formed, and the entry direction is controlled when the distal end is inserted into the target nerve.

Description

Epidural catheter with improved entry function {EPIDURAL CATHETER FOR DRUG ELUTING IMPROVED ENTRY FUNCTION}

The present invention relates to a catheter for epidural drug delivery, and more particularly, the tip of the drug injection hole formed can be easily inserted into the nerve hole, as well as direction control is possible, so that it can enter the correct position of the target nerve. It relates to an epidural drug delivery catheter with improved entry function.

A catheter is a tube-shaped, elongated medical procedure that is inserted into the human body and is used for diagnosis and treatment of diseases such as drug administration to lesions or tumor resection.

In particular, in vascular intervention, the catheter is introduced into a vessel with a lesion and then a drug is injected to treat the lesion.If the drug is delivered to tissues other than the lesion site, the problem of necrosis of the tissue outside the lesion occurs. It is important to locate it close to.

Accordingly, recently, a catheter capable of steering the tip of the catheter in a desired direction in a blood vessel with many branches has been developed.

For example, in Korean Patent Application Laid-Open No. 10-2010-0095782, a potential control unit composed of a plurality of balloons arranged in a form surrounding the outer circumferential surface of the catheter at the rear of the lesion removal tool, and a predetermined distance to the rear of the dislocation control unit A catheter center control unit consisting of a rear control unit consisting of a plurality of balloons arranged in a form surrounding the outer circumferential surface of the catheter at a spaced apart position is provided, and each By selectively inflating the balloon, it is possible to secure the centering of the catheter when the lesion is removed, and at the same time, when the catheter enters the blood vessel or when the lesion is removed, the position of the lesion removal tool provided at the front end of the catheter is adjusted to the entry direction of the catheter. Alternatively, it is intended to effectively target and remove the desired lesion while preventing damage to the inner wall of the blood vessel by controlling the direction of the cutting operation.

However, such a catheter is complicated in structure because a plurality of balloons must be individually controlled to control the entry direction or the moving direction, and there is a limit to minimizing the size of the catheter structure.

On the other hand, most of the conventional catheters are made of a very flexible material and the tip is blunt, so it is not possible to enter the nerve hole and the drug cannot be delivered to the nerve, causing the procedure to fail.

Republic of Korea Patent Publication No. 10-2010-0095782

Accordingly, the technical problem of the present invention is conceived in this respect, and an object of the present invention is that the distal end of the drug injection hole can be easily inserted into the nerve hole, as well as the direction control is possible so that the target nerve can enter the correct position. It relates to a catheter for epidural drug delivery with improved entry function.

An epidural drug delivery catheter with improved entry function according to an embodiment for realizing the object of the present invention described above. The epidural drug delivery catheter with improved entry function is a body part extending in one direction and the body part. And a distal end portion extending from the first end and having a drug injection port through which a drug is injected.

A plurality of threads spaced apart from each other by a predetermined distance are formed on the outer surface of the distal end, and the entry direction is controlled when the distal end is inserted into the target nerve.

In one embodiment, the distal end of the distal end may be formed in a round shape, and a plurality of drug injection ports may be formed between adjacent threads.

In an embodiment, a first entry control unit configured to contact an outer surface of the body unit to move the body unit in the longitudinal direction, and a first entry direction control unit configured to control an entry direction of the front end unit by rotating the body unit. .

In one embodiment, the first entry control unit may include a rotation motor and a gear unit driven by the rotation motor to move the body unit.

In one embodiment, a surface of the body portion in contact with the first entry control portion may be formed in a gear shape so as to mesh with the gear portion.

In one embodiment, the drug supply unit may further include a drug supply unit connected to the second end of the body unit to provide a drug into the body unit.

In one embodiment, the tube portion that is made of a flexible material and extends in the longitudinal direction of the tube portion, and further includes a pair of first and second wires fixed to face each other on an inner surface or an outer surface of the tube portion can do.

In an embodiment, a second entry direction control unit may further include a second entry direction controller configured to selectively pull the first or second wires and adjust the bending of the body portion to control an entry direction of the front end portion.

In an embodiment, a second entry adjustment unit may further include a second entry adjustment unit that contacts the outer surface of the tube unit and moves the body unit and the tube unit in the longitudinal direction.

According to the present embodiments, by forming a plurality of threads on the tip of the catheter, when the catheter is inserted into the nerve hole, it can more easily penetrate the nerve hole so that the catheter can be positioned at the correct target nerve region. Drugs can be injected into the nerve area.

In addition, as the drug injection port is uniformly formed between adjacent threads, the drug may be uniformly provided to the target nerve region through the drug injection port.

Furthermore, by controlling the entry direction of the body part and the distal end connected from the body part through the entry direction controller connected to the body part of the catheter, the entry is deformed from a straight shape to a curved shape, or a straight shape and a curved shape are repeatedly formed. So that you can gradually reach the correct target nerve area.

Furthermore, by forming the outer surface of the body part of the catheter or the tube part covering the body part in a gear shape to mesh with the gear part of the entry control part, the body part and the tip part can be adjusted to move along the length direction.

1 is a schematic diagram showing a state in which an epidural drug delivery catheter according to an embodiment of the present invention is inserted near a target nerve.
Figure 2 is a schematic diagram showing the catheter for the epidural drug delivery of Figure 1;
FIG. 3 is a schematic diagram showing a distal end and a body of the catheter for epidural drug delivery of FIG. 2.
Figure 4 is a schematic diagram showing a catheter for epidural drug delivery according to another embodiment of the present invention.

The present invention will be described in detail in the text, since various modifications can be made and various forms can be obtained. However, this is not intended to limit the present invention to a specific form disclosed, it should be understood to include all changes, equivalents, or substitutes included in the spirit and scope of the present invention. In describing each drawing, similar reference numerals have been used for similar elements. Terms such as first and second may be used to describe various elements, but the elements should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another component. The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present application, terms such as "comprise" or "consist of" are intended to designate the presence of features, numbers, steps, actions, elements, parts, or combinations thereof described in the specification, but one or more other features. It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof, does not preclude in advance the possibility of the presence or addition.

Unless otherwise defined, all terms used herein including technical or scientific terms have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms as defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and should not be interpreted as an ideal or excessively formal meaning unless explicitly defined in the present application. Does not.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

1 is a schematic diagram showing a state in which an epidural drug delivery catheter according to an embodiment of the present invention is inserted near a target nerve. Figure 2 is a schematic diagram showing the catheter for the epidural drug delivery of Figure 1; FIG. 3 is a schematic diagram showing a distal end and a body of the catheter for epidural drug delivery of FIG. 2.

Referring to FIG. 1, a catheter 10 for delivering an epidural drug with improved entry function according to an embodiment of the present invention is inserted into a nerve hole 20 and then injects a drug 30 into a target nerve region.

That is, the operator inserts the catheter 10 into the body tissue (epidural space) in consideration of the location of the target nerve, and then the distal end 200 of the catheter 10 (refer to FIG. 2) is located near the desired target nerve. Check if there is. Thereafter, when it is determined that one end of the distal end 200 has reached the target nerve, the operator may operate the drug supply unit to accurately supply a treatment or anesthetic drug to the target nerve through the catheter 10. In this way, since the drug injected through the catheter 10 is effectively injected into the target nerve, the treatment effect intended by the operator may be more accurately displayed.

More specifically, referring to FIG. 2, the catheter 10 includes a body part 100, a tip part 200, a first entry control part 300, a first entry direction control part 400, and a drug supply part 500. Includes.

The body portion 100 has a certain inner diameter and extends in one direction, and a through path through which a drug can pass is provided therein. The body part 100 may be made of a hard material such as a metal material to perform a basic function of guiding a path to an area where a lesion has occurred. However, since it must be extended to bend to a required position, a material capable of bending may be included.

The distal end 200 extends from a first end of the body 100, and a drug injection port through which a drug is injected is provided at the extended end. The distal end portion 200 extends from the body portion 100 and is guided along with the body portion 100 toward the target nerve region (the area where the lesion has occurred). Can be done.

The distal end portion 200 is connected to the body portion 100 so that when a drug is supplied to the body portion 100 from the drug supply portion, the drug can be delivered from the body portion 100, and the position where the drug is inserted. Can be injected into the target nerve in

On the other hand, when the front end portion 200 is inserted into a nerve hole, a plurality of threads 210 spaced apart a predetermined distance from each other as shown in FIG. 3 on the outer surface to easily penetrate the nerve hole and enter the nerve hole. ), and in this case, the plurality of threads may extend in the same diagonal direction.

Thus, when the tip part 200 enters the nerve hole, the nerve hole can be more easily penetrated in one direction and may be positioned at an accurate target nerve region. Accordingly, the drug is placed in the correct target nerve region. The drug can be injected through the injection port 220.

At this time, the drug injection port 220 may be formed in a plurality so that an appropriate amount of the drug can be injected into the target nerve region for a predetermined time through the tip portion 200, and as shown, threads adjacent to each other ( 210), so that the drug can be more evenly injected into the nerve cavity.

In addition, as the tip of the tip portion 200 is formed in a streamlined shape in a round shape, it enables smoother movement when the catheter 10 is inserted into the body and moved, and in particular, it enters without hurting the internal tissues. You can do it.

Further, the tip portion 200 is positioned near the target nerve so that the position does not deviate from the target nerve as the entry direction is controlled and entered when inserted into the nerve hole, that is, as shown in FIG. Can be located in

In this case, the first entry control part 300 contacts the outer surface of the body part 100 to move the body part 100 in the longitudinal direction, and the first entry direction control part 400 By rotating 100, the entry direction of the tip part 200 may be controlled.

More specifically, the first entry control unit 300 includes a rotation motor 310 and a gear unit 320 connected to the rotation motor 310 and rotated by the rotation motor 310 as shown. do.

At this time, the surface of the body part 100 in contact with the first entry control part 300 is formed in a gear shape to be meshed with the gear part 320, and thus power from the gear part 320 Can be delivered. Thus, when the gear part 320 rotates in one direction, the body part 100 may move in the longitudinal direction according to the rotation of the gear part 320 and enter the target nerve part.

In this case, the gear unit 320 may be, for example, a bevel gear or the like.

Further, the first entry direction control unit 400 rotates the body part 100 so that when the tip part 200 enters the target nerve region, it is deformed from a straight shape to a curved shape to enter the correct target nerve region. Or, by repeatedly forming a straight shape and a curved shape, and entering it, gradually reaching the correct target nerve area.

When the catheter 10 is inserted into the body tissue by manually manipulating the first entry direction control unit 400 as described above, the operator can adjust the tip of the distal end 200 to be positioned at a desired site. That is, the operator may select the treatment site and the shape of the tip portion 200 to be formed in a straight or curved shape, and may select to be bent at various angles and shapes in the curved shape.

In particular, the operator can visually check the body part 100 while moving the body part 100 little by little while the catheter 10 is inserted into the body tissue so that the tip part 200 is positioned more accurately at the lesion site to perform an accurate diagnosis. I can.

Meanwhile, as shown in FIG. 2, the drug supply unit is connected to the second end of the body part 100 so that the drug may be provided through the through path of the body part 100 as described above. A drug injection hole (not shown) is formed on the side of the drug supply part 500 connected to the second end of the body part 100, and the operator controls the supply amount of the drug by controlling the opening and closing of the drug injection hole. This may be provided as the body part 100.

In this way, the drug provided to the body part 100 is delivered to the distal end 200 and discharged to the lesion site through the drug injection port 220 of the distal end 200 so that the lesion area can be treated.

Figure 4 is a schematic diagram showing a catheter for epidural drug delivery according to another embodiment of the present invention.

The catheter 11 for epidural drug delivery according to this embodiment is shown in FIGS. 1 to 3 except that the tube part 600 and a pair of first and second wires 710 and 720 are included. Since it is the same as the epidural drug delivery catheter 10 described with reference, the same reference numerals are used and redundant descriptions are omitted.

4, the catheter 11 for epidural drug delivery according to this embodiment includes a tube part 600, a pair of first and second wires 710 and 720, and a second entry control part 301 ) And a second entry direction control unit 401.

The tube part 600 extends in the same direction as the body part 100 and covers the body part 100. That is, the tube part 600 has a certain inner diameter and a passage is formed therein so that the body part 100 is positioned in the passage.

In addition, the tube portion 600 is made of a flexible material, for example, may be made of a synthetic resin.

The pair of first and second wires 710 and 720 extend in the longitudinal direction of the tube part 600 and are fixed to face each other on an inner surface or an outer surface of the tube part 600.

The catheter 11 may be inserted into the body tissue while the body portion 100 and the tip portion 200 extend in a straight line, and the second entry direction control unit 401 By pulling any one of the second wires 710 and 720, the direction of the tip portion 200 may be adjusted to bend as shown in FIG. 4.

That is, in the catheter 11 in this embodiment, the body part 100 rotates by itself and does not bend in a required direction, and selectively pulls the wires 710 and 720 formed in the tube part 600. As a result, by rotating the position of the body part 100 together with the tube part 600, there is an advantage in that the rotation of the position with respect to the body part 100 can be more accurately controlled.

On the other hand, the second entry control unit 301 is not shown, but the rotation motor 311 and the rotation motor 311 like the first entry control unit 300 described with reference to FIGS. 1 to 3 above. It is connected and includes a gear unit 321 rotated by the rotation motor 311.

In this case, the second entry adjustment part 301 may contact the outer surface of the tube part 600 to move the tube part 600 and the body part 100 together in the longitudinal direction. To this end, a portion of the outer surface of the tube part 600 may be formed in a gear shape to mesh with the gear part 321 and may be moved along the length direction by receiving a driving force by rotation of the gear part 321. I can.

As described above, in this embodiment, the entry direction of the catheter 11 may be changed to a desired direction through the second entry control unit 301 and the second entry direction control unit 401, and as close as possible to the desired lesion site. Make it reachable.

According to the present embodiments, by forming a plurality of threads on the tip of the catheter, when the catheter is inserted into the nerve hole, it can more easily penetrate the nerve hole so that the catheter can be positioned at the correct target nerve region. Drugs can be injected into the nerve area.

In addition, as the drug injection port is uniformly formed between adjacent threads, the drug may be uniformly provided to the target nerve region through the drug injection port.

Furthermore, by controlling the entry direction of the body part and the distal end connected from the body part through the entry direction controller connected to the body part of the catheter, the entry is deformed from a straight shape to a curved shape, or a straight shape and a curved shape are repeatedly formed. So that you can gradually reach the correct target nerve area.

Furthermore, by forming the outer surface of the body part of the catheter or the tube part covering the body part in a gear shape to mesh with the gear part of the entry control part, the body part and the tip part can be adjusted to move along the length direction.

Although the above has been described with reference to preferred embodiments of the present invention, those skilled in the art will be able to variously modify and change the present invention without departing from the spirit and scope of the present invention described in the following claims. You will understand that you can.

100: body part 200: tip part
300: first entry control unit 400: first entry direction control unit
500: drug supply unit 600: tube unit
710: first wire 720: second wire

Claims (9)

A body portion extending in one direction;
A distal end portion extending from a first end of the body portion and having a drug injection port through which a drug is injected;
A tube part made of a flexible material to cover the body part;
A pair of first and second wires extending in the longitudinal direction of the tube portion and fixed to face each other on an inner surface or an outer surface of the tube portion;
A second entry direction controller configured to selectively pull the first or second wires and adjust the bending of the body portion to control an entry direction of the front end portion; And
And a second entry control part which contacts the outer surface of the tube part and moves the body part and the tube part in the longitudinal direction,
A plurality of threads spaced apart from each other by a predetermined distance are formed on the outer surface of the front end,
An epidural drug delivery catheter, characterized in that the direction of entry is controlled when the tip is inserted into the target nerve. The method of claim 1,
The end of the front end is formed in a round shape,
The drug injection port is an epidural drug delivery catheter, characterized in that formed in a plurality between adjacent threads. delete delete delete The method of claim 1,
An epidural drug delivery catheter further comprising a drug supply part connected to the second end of the body part to provide a drug into the body part. delete delete delete

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